Home / 641,942.64-885,885.12-355,481.28

Finding the Fourth Proportional to 641,942.64, 885,885.12 and 355,481.28

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Solution

The fourth proportional to 641,942.64, 885,885.12 and 355,481.28 is: 490,566.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,942.64 : 885,885.12 = 355,481.28 : x
  2. Step 2: Convert to fraction form
    641,942.64/885,885.12 = 355,481.28/x
  3. Step 3: Cross multiply
    641,942.64x = 885,885.12 × 355,481.28
  4. Step 4: Simplify right side
    641,942.64x = 314,915,576,390.55
  5. Step 5: Solve for x
    x = 314,915,576,390.55/641,942.64
  6. Step 6: Final answer
    x = 490,566.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.